EP2091261A3 - White balance calibration for digital camera device - Google Patents

White balance calibration for digital camera device Download PDF

Info

Publication number
EP2091261A3
EP2091261A3 EP20080006441 EP08006441A EP2091261A3 EP 2091261 A3 EP2091261 A3 EP 2091261A3 EP 20080006441 EP20080006441 EP 20080006441 EP 08006441 A EP08006441 A EP 08006441A EP 2091261 A3 EP2091261 A3 EP 2091261A3
Authority
EP
Grant status
Application
Patent type
Prior art keywords
digital camera
cct
camera device
calibration procedure
white balance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20080006441
Other languages
German (de)
French (fr)
Other versions
EP2091261B1 (en )
EP2091261A2 (en )
Inventor
Szepo Robert c/o QUALCOMM Incorporated Hung
Jingqiang c/o QUALCOMM Incorporated Li
Ruben M. c/o QUALCOMM Incorporated Velarde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/64Circuits for processing colour signals
    • H04N9/73Circuits for processing colour signals colour balance circuits, e.g. white balance circuits, colour temperature control
    • H04N9/735Circuits for processing colour signals colour balance circuits, e.g. white balance circuits, colour temperature control for picture signal generators
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00Diagnosis, testing or measuring for television systems or their details
    • H04N17/002Diagnosis, testing or measuring for television systems or their details for television cameras

Abstract

This disclosure describes automatic self-calibration techniques for digital camera devices. In one aspect, a method for performing a calibration procedure in a digital camera device comprises initiating the calibration procedure when a camera sensor of the digital camera device is operating, accumulating data for the calibration procedure, the data comprising one or more averages of correlated color temperature (CCT) associated with information captured by the camera sensor, calculating one or more CCT vectors based on the one or more averages of CCT, and generating gray point correction factors based on the one or more CCT vectors.
EP20080006441 2008-02-13 2008-03-31 White balance calibration for digital camera device Active EP2091261B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12030814 US8004566B2 (en) 2008-02-13 2008-02-13 Self calibration of white balance for a digital camera device using correlated color temperature data

Publications (3)

Publication Number Publication Date
EP2091261A2 true EP2091261A2 (en) 2009-08-19
EP2091261A3 true true EP2091261A3 (en) 2014-07-02
EP2091261B1 EP2091261B1 (en) 2015-07-29

Family

ID=40635866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080006441 Active EP2091261B1 (en) 2008-02-13 2008-03-31 White balance calibration for digital camera device

Country Status (6)

Country Link
US (1) US8004566B2 (en)
EP (1) EP2091261B1 (en)
JP (2) JP5512550B2 (en)
KR (1) KR101154136B1 (en)
CN (1) CN101911715B (en)
WO (1) WO2009102998A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100271489A1 (en) * 2009-04-23 2010-10-28 Nokia Corporation Imaging unit, apparatus comprising an imaging unit, a system, and methods for calibrating an imaging apparatus
US8462227B2 (en) * 2009-04-24 2013-06-11 Ati Technologies Ulc Digital camera module white balance calibration method and apparatus using only single illumination source data
KR101245199B1 (en) * 2011-04-20 2013-03-19 (주)아크로엠 Color balance control device and control method for camera
US20120314086A1 (en) * 2011-06-08 2012-12-13 Apple Inc. Camera test and calibration based on spectral monitoring of light
WO2014057588A1 (en) * 2012-10-12 2014-04-17 Necディスプレイソリューションズ株式会社 Brightness calibrator, program, and brightness calibration method
US8854709B1 (en) * 2013-05-08 2014-10-07 Omnivision Technologies, Inc. Automatic white balance based on dynamic mapping
CN103338383B (en) * 2013-06-25 2016-12-28 努比亚技术有限公司 Method and apparatus for white balance calibration
CN103963453B (en) * 2014-04-21 2016-07-06 杭州电子科技大学 A printing method of the preset gray balance
US9386289B2 (en) * 2014-04-29 2016-07-05 Intel Corporation Automatic white balancing with chromaticity measure of raw image data
CN105578166B (en) * 2016-01-08 2018-06-05 浙江宇视科技有限公司 Method and apparatus for determining the color temperature
CN105872513A (en) * 2016-06-17 2016-08-17 刘华英 White balance method based on environment characteristic value and white balance device based on environment characteristic value
CN106791758B (en) * 2016-12-07 2018-07-06 浙江大华技术股份有限公司 Mixing natural kinds of image light color temperature determination method and apparatus

Citations (2)

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EP1311111A2 (en) * 2001-11-08 2003-05-14 Fuji Photo Film Co., Ltd. Method and apparatus for correcting white balance, method for correcting density and program recording medium
US6654493B1 (en) * 1998-11-13 2003-11-25 Lightsurf Technologies, Inc. Charactering and calibrating an image capture device

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JPS612487A (en) * 1984-06-14 1986-01-08 Sony Corp Automatic white balance adjusting method of color video camera
JP2776437B2 (en) * 1987-02-18 1998-07-16 ミノルタ株式会社 Automatic white balance adjustment device
JPH05300525A (en) * 1991-04-19 1993-11-12 Hitachi Gazou Joho Syst:Kk White balance controller
US5821993A (en) 1996-01-25 1998-10-13 Medar, Inc. Method and system for automatically calibrating a color camera in a machine vision system
US5995142A (en) * 1996-02-04 1999-11-30 Sony Corporation Automatic white balance control system for a color video camera
US6023264A (en) * 1998-04-24 2000-02-08 Adobe Systems Incorporated Method to estimate the white point on a display device
US6249601B1 (en) * 1998-12-04 2001-06-19 Samsung Electronics Co., Ltd. Method for determining color of illuminant and apparatus therefor
JP2001275122A (en) * 2000-03-27 2001-10-05 Minolta Co Ltd Digital camera
US6947079B2 (en) * 2000-12-22 2005-09-20 Eastman Kodak Company Camera having verification display with reverse white balanced viewer adaptation compensation and method
US7084907B2 (en) * 2001-01-15 2006-08-01 Nikon Corporation Image-capturing device
JP4059708B2 (en) * 2001-06-01 2008-03-12 オリンパス株式会社 Digital camera and the white balance adjustment method
US7184080B2 (en) * 2001-06-25 2007-02-27 Texas Instruments Incorporated Automatic white balancing via illuminant scoring
US7218344B2 (en) * 2001-08-15 2007-05-15 Sony Corporation System and method for efficiently performing a white balance operation
JP3719424B2 (en) 2002-05-09 2005-11-24 セイコーエプソン株式会社 Image processing system, projector, image processing method, program and information storage medium
US7218358B2 (en) * 2004-06-15 2007-05-15 Coretronic Corporation Method and apparatus for calibrating color temperature of color display devices
JP2006279459A (en) * 2005-03-29 2006-10-12 Seiko Epson Corp Device, method and program for image photography, and recording medium
JP4539432B2 (en) * 2005-05-16 2010-09-08 ソニー株式会社 The image processing device and an imaging apparatus
US7912279B2 (en) * 2006-10-26 2011-03-22 Qualcomm Incorporated Automatic white balance statistics collection
US8049789B2 (en) * 2006-12-15 2011-11-01 ON Semiconductor Trading, Ltd White balance correction using illuminant estimation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6654493B1 (en) * 1998-11-13 2003-11-25 Lightsurf Technologies, Inc. Charactering and calibrating an image capture device
EP1311111A2 (en) * 2001-11-08 2003-05-14 Fuji Photo Film Co., Ltd. Method and apparatus for correcting white balance, method for correcting density and program recording medium

Also Published As

Publication number Publication date Type
KR101154136B1 (en) 2012-06-13 grant
EP2091261B1 (en) 2015-07-29 grant
JP2011512112A (en) 2011-04-14 application
US20090201374A1 (en) 2009-08-13 application
EP2091261A2 (en) 2009-08-19 application
CN101911715B (en) 2012-12-05 grant
JP2014042272A (en) 2014-03-06 application
WO2009102998A1 (en) 2009-08-20 application
KR20100121665A (en) 2010-11-18 application
US8004566B2 (en) 2011-08-23 grant
CN101911715A (en) 2010-12-08 application
JP5512550B2 (en) 2014-06-04 grant

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